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Tag Archives: C#

Snap7: an open source Siemens S7 communication library

In a recent comment i came across Snap7, a new Siemens S7 open source library to communicate with Siemens Plc S7-300, S7-400, S7-1200 and S7-1500. It supports many languages (C++, C# and more) and it’s multi-platform. The library can be downloaded from http://snap7.sourceforge.net and the official page of the project ...

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OPC XML DA Client with C#

With this article I want to show how to create a webservice in C# to communicate with an OPC-XML-DA server, like the one of SIMOTION D plc. OPC-XML-DA is a communication protocol based on SOAP and XML. To connect to a OPC-XML-DA server you need a WSDL file, that defines ...

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Writing your first HMI project in C# – WPF

UPDATE 08/03/2017: I see that this article is quite popular, however it takes a simple approach to get you started, by using timers and other shortcomings. If you want to build your HMI with WPF and MVVM you can check also my new series HMI with C# and WPF. In ...

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How to use Windows 7 dialogs with WPF

Wpf is an advanced technology to build responsive user interfaces, but for many tasks (MessageBox, Folder Browser, Progress Dialog) you still have to use the old Windows Forms dialogs. Windows 7 replaced this old forms with new ones to provide a better User Interface and a better feeling to their ...

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Using AdvancedHMI’s PLC drivers with C#

AdvancedHmi is a free and “almost open-source” HMI framework written in VB.Net that offer some drivers for PLCs, and also offer free SCADA objects for winforms users. I say “almost open-source” because the code of the two main libraries is not provided (MfgControl.AdvancedHMI.Drivers.dll and MfgControl.AdvancedHMI.Controls.dll), but it’s provided how to ...

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Opc client with C#: an how to video

I made a video where i explain how to connect and read tags from and Opc server using OpcNetApi.dll library with C#. This post follows a serie of old article that you can read on my old blog. This code comes from Beckhoff OPC how-to section and if you run a ...

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WPF and multithread: debugging with Console

You can download the sample here: https://www.mesta-automation.com/Downloads/multithread.rar With WPF it’s almost a must to use multiple threads to keep the User Interface responsive, and debugging them can be a problem when they are complex. Usually i debug the background threads with the Console, while keeping the Main Window visible, like in ...

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